------------------------------------------------------------------- THE ASTRONOMER Electronic Circular No 2631 2010 Mar 26 17.37UT Ed:Guy M Hurst, 16,Westminster Close, Kempshott Rise, Basingstoke, Hants, RG22 4PP,England.Telephone/FAX(01256)471074Int:+441256471074 INTERNET: GUY@TAHQ.DEMON.CO.UK Backup: gmh@wdcc1.bnsc.rl.ac.uk WORLD WIDE WEB http://www.theastronomer.org ------------------------------------------------------------------- SUPERNOVA 2010au in PGC 82347 Further to the announcement on TA E-Circular 2630 of the discovery of SN2010au by Ron Arbour, spectral confirmation has now also been obtained. J. M. Silverman et. al., University of California, Berkeley, report on CBET 2223 that inspection of CCD spectra (range 340-1000 nm), obtained on 2010 Mar. 22 UT with the 3-m Shane reflector (+ Kast) at Lick Observatory, shows SN 2010au is also a type-Ia supernova, possibly of the SN 1999aa variety then within about two days of maximum light, but the spectrum is noisy and heavily contaminated by host-galaxy starlight; after removing the host-galaxy recession velocity of 18300 km/s, determined from narrow emission features, the absorption minimum of the Si II 635.5-nm line is found to be blueshifted by about 10400 km/s. SUPERNOVA 2010B IN NGC 5370 Discovery by Masaki Tsuboi, Japan of a possible supernova (CBET 2115): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010B Jan 7.73 13 54 08.7 +60 40 50.4 14.4 5.1"W, 9.1"N Nothing is visible at this location on Tsuboi's past frames taken on 2009 Sept. 6 and Nov. 21 UT (limiting mag 16.7) and on the Digitized Sky Survey (DSS), and he reports mag 14.5 for 2010B on Jan. 8.661. SUPERNOVA 2010C IN NGC 3428 Discovery by LOSS of a possible supernova (CBET 2119): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010C Jan 10.49 10 51 29.87 +09 16 33.1 18.8 5.3"E,12.9"S SUPERNOVA 2010D in IN UGC 5714 Discovery by LOSS of a possible supernova (CBET 2119): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010D Jan 10.50 10 31 44.28 +46 40 05.0 17.0 7.7"W,12.8"S SUPERNOVA 2010E IN ESO 13-G28 Discovery by Ralph martin, Perth Observatory, of a possible supernova (CBET 2121): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010E Jan 10.57 02 02 32.48 -79 40 52.5 17R 1.0"E,35.0"S SUPERNOVA 2010F IN NGC 3120 Discovery by the CHASE project of a possible supernova (CBET 2125): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010F Jan 13.26 10 05 21.05 -34 13 21.0 14.8 24.8"W, 9.1"S SUPERNOVA 2010G IN ANONYMOUS GALAXY Discovery by the ROTSE collaboration of a possible supernova (CBET 2126): SN 2010 UT R.A. (2000.0) Decl. Mag. Offset 2010G Jan 9.46 12 25 10.01 +45 19 43.9 19.4 0.5"W, 1.5"S Guy M Hurst